DS200QTBAG1ADC GE

3HAB7085-3 Harness Teach Pendant ABB
3HAB7203-1 ABB
3HAB7216-1 Mountingset I/O pos. 1,2 ABB
3HAB7239-3 Floppy cooler ABB
3HAB7302-1 Bottom ABB
3HAB7389-2 Bridge connector 2 poles ABB
3HAB7427-1 Cable Jib Circ Breaker F1 ABB
3HAB7551-1 RAPID Reference Manual ABB
3HAB7648-1 Cust. cable power- sign. ABB
3HAB7700-88 Hex socket head cap screw ABB –
3HAB7806-1 Dismounting Bearing P-Rod ABB
3HAB7862-1 Lock ABB

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描述

外部DC24V电源若输入回路有DC24V供电的接近开关、光电开关等,而PLC上DC24V电源容量不够时,要从外部提供DC24V电源;但该电源的“—”端不要与PLC的DC24V的“—”端以及“COM”端相连,否则会影响PLC的运行。输入的灵敏度各厂家对PLC的输人端电压和电流都有规定,如日本三菱公司F7n系列PLC的输入值为:DC24V、7mA,启动电流为4.5mA,关断电流小于1.5mA,因此,当输入回路串有二极管或电阻(不能完全启动),或者有并联电阻或有漏电流时(不能完全切断),就会有误动作,灵敏度下降,对此应采取措施。另一方面,当输入器件的输入电流大于PLC的最大输入电流时,也会引起误动作,应采用弱电流的输入器件,并且选用输人为共漏型输入的PLC,Bp输入元件的公共点电位相对为负,电流是流出PLC的输入端。

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